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MCQs

General Biology

Total Questions : 1232 | Page 2 of 124 pages
Question 11. Vessel of xylem in plants is a
  1.    structure that keeps growing
  2.    dead structure
  3.    useless in perennials
  4.    not composed of pits
 Discuss Question
Answer: Option B. -> dead structure
Answer: (b).dead structure
Question 12. In xylem vessel, the lignin is deposited in the form of
  1.    bell shape
  2.    concave
  3.    bean shaped
  4.    ring shape
 Discuss Question
Answer: Option D. -> ring shape
Answer: (d).ring shape
Question 13. Sunflower is an example of
  1.    woody plants
  2.    herbaceous plants
  3.    perennials
  4.    biennials
 Discuss Question
Answer: Option B. -> herbaceous plants
Answer: (b).herbaceous plants
Question 14. Hollow space between xylem is called
  1.    vessel
  2.    lumen
  3.    lignin
  4.    pits
 Discuss Question
Answer: Option B. -> lumen
Answer: (b).lumen
Question 15. Plants surviving for two growing seasons are known as
  1.    woody plants
  2.    herbaceous plants
  3.    annuals
  4.    biennials
 Discuss Question
Answer: Option D. -> biennials
Answer: (d).biennials
Question 16. Function of a companion cell is to provide
  1.    repair protoplasm of sieve tube
  2.    repair cytoplasm of sieve tube
  3.    provide a central vacuole support to sieve tube
  4.    helps sieve tube cells remain alive
 Discuss Question
Answer: Option D. -> helps sieve tube cells remain alive
Answer: (d).helps sieve tube cells remain alive
Question 17. Miscarriages in women may be due to intake of
  1.    carbon dioxide
  2.    polluted water
  3.    water containing dioxins
  4.    DDT
 Discuss Question
Answer: Option C. -> water containing dioxins
Answer: (c).water containing dioxins
Question 18. Over a period of time, mosquitoes have developed resistance to
  1.    dichlorodiphenyl trichloroethane (DDT)
  2.    biochemical oxygen demand (BOD)
  3.    dioxins
  4.    eutrophication
 Discuss Question
Answer: Option A. -> dichlorodiphenyl trichloroethane (DDT)
Answer: (a).dichlorodiphenyl trichloroethane (DDT)
Question 19. In flowering plants, Sieve tubes are a characteristic of
  1.    xylem vessels
  2.    phloem tissues
  3.    pith cells
  4.    lumen
 Discuss Question
Answer: Option B. -> phloem tissues
Answer: (b).phloem tissues
Question 20. Advantages of using pesticides include
  1.    healthier crops
  2.    better yield
  3.    more food and profit for farmers
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above

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